CN109776761A - A kind of moulding concrete with can steam-cured polyurethane template preparation material and can steam-cured polyurethane template and preparation method thereof - Google Patents
A kind of moulding concrete with can steam-cured polyurethane template preparation material and can steam-cured polyurethane template and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to moulding technical field of concrete, and in particular to a kind of moulding concrete with can steam-cured polyurethane template preparation material and can steam-cured polyurethane template and preparation method thereof.The present invention provides a kind of moulding concrete with can steam-cured polyurethane template preparation material, including following content of component: 45~75 parts of polyolefin polyhydric alcohol；20~80 parts of isocyanates；5~35 parts of plasticizer；0~20 part of diluent；3~25 parts of chain extender；0~3 part of antiager；0~1.5 part of defoaming agent；0~3 part of catalyst.With it is of the present invention preparation material obtain can steam-cured polyurethane template tensile strength be 5.5~8.5MPa, elongation at break be 210~380%, tear-resistant ability is strong；70 DEG C, to impregnate 1000h post-tensioning loss of strength rate be 4.5~5.8% to 20%NaOH solution, can the resistance to alkaline hydrolysis of steam-cured polyurethane template, ageing-resistant ability it is strong.
Description
Technical field
The invention belongs to moulding technical field of concrete, and in particular to a kind of moulding concrete is with can steam-cured polyurethane template
Preparation material and can steam-cured polyurethane template and preparation method thereof.
Background technique
Moulding concrete is a kind of surface layer by normal concrete, is set by the intention of texture, skin texture and irregular lines
Meter, the organic assembling of pattern and color, create various similar natural marbles, granite, brick, watt etc. laying effects coagulation
Native produce has the characteristics that the beautiful nature of figure, quality are sturdy and durable.
The key technology of moulding concrete production is mould, and template is the part directly contacted with concrete, mixed
Usage amount is big, area is wide in Xtah Crude Clay structure construction, determines the shape, size and appearance of concrete.
The preparation material of mould mainly has silica gel and polyurethane at present.Silica gel material prepares template convenient formation, and price is suitable
In, template alkali resistance is strong, and application is relatively broad, but since tensile strength is lower, be easy to produce tearing phenomenon, access times by
Limitation, therefore be generally all used as disposable by the template of silica gel preparation or used once in a while.The template of polyurethane preparation material preparation is drawn
It is higher to stretch intensity, it is tear-resistant, can Reusability, but the resistance to alkaline hydrolysis performance of general polyurethane is poor, is existed with the template that this is prepared
Using repeatedly after also will appear contraction problem, it is equal in order to shorten the concrete production period for precast concrete
Using steam curing, it is steam-cured during temperature it is higher, the alkalinity of concrete and big causes in concrete steam-cured environment, template
Intensity sharply declines, and causes Crack Damage, eventually leads to destruction, loss of properties on aging.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of moulding concrete with can steam-cured polyurethane template preparation
Material, meets that moulding concrete polyurethane mould material tensile strength is high, resistance to alkaline hydrolysis is had excellent performance and what ageing-resistant performance was excellent wants
It asks；The present invention also provides a kind of moulding concrete with can steam-cured polyurethane template and preparation method thereof.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
The present invention provides a kind of moulding concrete with can steam-cured polyurethane template preparation material, including following mass parts group
Point:
Preferably, the hydroxyl value of the polyolefin polyhydric alcohol is 45~110mgKOH/g, and degree of functionality is 2.0~2.5；
The isocyanates is liquefaction methyl diphenylene diisocyanate, polymeric diphenylmethane diisocyanate, toluene
One of diisocyanate, hexamethylene diisocyanate, hydrogenated diphenyl methane diisocyanate and naphthalene diisocyanate are a variety of；
The plasticizer is phenyl alkylsulf, epoxidized soybean oil, dibutyl phthalate, dioctyl phthalate
With one of sebacic acid dimethyl ester or a variety of；
The diluent is urethane grade organic solvent；
The chain extender is one of soybean oil chain extender BH760, propylene glycol, the pure and mild vegetable oil acid glycol of castor oil two
Or it is a variety of；
The antiager is one of antioxidant 1010, antioxidant 245, antioxidant 1035 and antioxidant 1076 or more
Kind；
The defoaming agent is BYK-088；
The catalyst is triethylenediamine, dibutyl tin dilaurate, stannous octoate, phenylmercuric acetate or aphthenic acids
Zinc.
Preferably, the urethane grade organic solvent is acetone, butyl acetate, ethyl acetate, toluene, dimethylbenzene, carbonic acid two
One of methyl esters and dimethyl adipate are a variety of.
The present invention also provides the preparation material obtained a kind of moulding concrete of molding described in above-mentioned technical proposal with can steam
Support polyurethane template.
The present invention also provides described in above-mentioned technical proposal moulding concrete with can steam-cured polyurethane template preparation side
Method includes the following steps:
(1) mixture of part polyolefin polyhydric alcohol and plasticizer is successively carried out to vacuum dehydration and cooling processing, is obtained
First polyalcohol mixture；
(2) the first polyalcohol mixture for obtaining the step (1) is mixed with isocyanates, is reacted, is obtained pre-
Aggressiveness；
(3) mixture of remaining polyolefin polyhydric alcohol and chain extender is successively carried out to vacuum dehydration and cooling processing, is obtained
To the second polyalcohol mixture；
The second polyalcohol mixture, antiager, diluent, defoaming agent and catalyst are mixed under protective atmosphere
It closes, obtains curing agent；
(4) it after mixing the performed polymer that the step (2) obtains and the curing agent that the step (3) obtains, successively carries out
Deaeration, die casting and solidification obtain polyurethane template；
The step (2) and step (3) do not have chronological order.
Preferably, ladder-elevating temperature includes the first heating successively carried out and second liter in the step (1) and step (3)
Temperature；The initial temperature of the first heating is 18~25 DEG C, and final temperature is 70~95 DEG C, and heating rate is 1~50 DEG C/min；
It is described second heating initial temperature be 70~95 DEG C, final temperature be 100~115 DEG C, heating rate be 0.01~10 DEG C/
min。
Preferably, the vacuum degree of vacuum dehydration independently is -0.085~-0.1MPa in the step (1) and step (3)；
Stirring rate independently is 1~200rpm when the vacuum dehydration, and the time independently is 0.2~20h.
Preferably, the temperature reacted in the step (2) is 70~80 DEG C, the reaction time is 0.2~for 24 hours.
Preferably, reaction temperature reaches through ladder-elevating temperature in the step (2)；The ladder-elevating temperature includes successively carrying out
The first heating and the second heating；The initial temperature of the first heating is 18~25 DEG C, and final temperature is 60~65 DEG C, heating speed
Rate is 1~50 DEG C/min；The initial temperature of second heating is 60~65 DEG C, and final temperature is 70~80 DEG C, heating rate
For 0.01~10 DEG C/min.
Preferably, in the step (4) vacuum defoamation vacuum degree be -0.085~-0.1MPa, the time be 0.1~for 24 hours；
Described solidify includes the first solidification and the second solidification successively carried out；The first cured pressure is 0~15MPa, and temperature is
10~80 DEG C, the time be 0.1~for 24 hours；The second cured temperature is 80~150 DEG C, and the time is 0.1~240h.
The present invention provides a kind of moulding concrete with can steam-cured polyurethane template preparation material, including following mass parts
Component: 45~75 parts of polyolefin polyhydric alcohol；20~80 parts of isocyanates；5~35 parts of plasticizer；0~20 part of diluent；Chain extender
3~25 parts；0~3 part of antiager；0~1.5 part of defoaming agent；0~3 part of catalyst.The present invention is with polyolefin polyhydric alcohol and isocyanide
Acid esters is primary raw material, for synthesizing performed polymer in the preparation of polyurethane template, provides material base for polyurethane mould material；It is logical
Polyolefin polyhydric alcohol and chain extender, catalyst, diluent, antiager and defoaming agent collaboration proportion are crossed, convenient for forming solidification
Agent, may advantageously facilitate the strand extension of performed polymer, and being crosslinked with for polyurethane mould material strand is conducive to enhancing polyurethane mould
The tensile strength and elongation at break of plate material can reduce polyurethane mould material and pour in use with moulding concrete
The rigid collision of material is infused, the tearing possibility of polyurethane mould material is reduced；Each source chemicals and pre-polymerization in curing agent simultaneously
In body under raw material synergistic effect, be conducive to the anti-aging and resistance to alkaline hydrolysis performance for enhancing polyurethane mould material；Performed polymer and solidification
Tensile strength height, the moulding coagulation that resistance to alkaline hydrolysis is had excellent performance and ageing-resistant performance is excellent can be synthesized under agent each component collective effect
Soil is used can steam-cured polyurethane template.
Experiment effect show with the preparation obtained moulding concrete of material of the present invention with can steam-cured polyurethane template drawing
Stretching intensity is 5.5~8.5MPa, and elongation at break is 210~380%, and the tear-resistant ability of polyurethane template is strong；70 DEG C, 20%
It is 4.5~5.8% that NaOH solution, which impregnates 1000h post-tensioning loss of strength rate, and the resistance to alkaline hydrolysis of polyurethane template, ageing-resistant ability are strong；
Hardness meets the hardness requirement of moulding concrete polyurethane template up to 50~80ShoreA.
Specific embodiment
The present invention provides a kind of moulding concrete with can steam-cured polyurethane template preparation material, including following mass parts group
Point:
In the present invention, if without specified otherwise, all components be commercial goods well known to those skilled in the art i.e.
It can.
In terms of mass parts, moulding concrete provided by the invention with can the preparation material of steam-cured polyurethane template include polyolefin
45~75 parts of polyalcohol, preferably 47~73 parts, more preferably 50~70 parts.In the present invention, the polyolefin polyhydric alcohol
Hydroxyl value is preferably 45~110mgKOH/g.In the present invention, the degree of functionality of the polyolefin polyhydric alcohol is preferably 2.0~2.5.?
In the present invention, the polyolefin polyhydric alcohol is preferably hydrophobicity polyolefin polyhydric alcohol.In the present invention, the polyolefin polyhydric alcohol
Preferably end hydroxy butadiene or poly- 2- methyltetrahydrofuran glycol or modified castor oil glycol.The present invention is to the modification
Method is not particularly limited, using method of modifying well known to those skilled in the art.
On the basis of the mass parts of the polyolefin polyhydric alcohol, moulding concrete provided by the invention is used can steam-cured polyurethane
The preparation material of template includes 20~80 parts of isocyanates, preferably 25~75 parts, more preferably 30~70 parts.In the present invention,
The isocyanates preferably liquefaction methyl diphenylene diisocyanate, polymeric diphenylmethane diisocyanate, toluene two is different
One of cyanate, hexamethylene diisocyanate, hydrogenated diphenyl methane diisocyanate and naphthalene diisocyanate are a variety of.
On the basis of the mass parts of the polyolefin polyhydric alcohol, moulding concrete provided by the invention is used can steam-cured polyurethane
The preparation material of template includes 5~35 parts of plasticizer, preferably 7~33 parts, more preferably 10~30 parts.In the present invention, described
Plasticizer is preferably phenyl alkylsulf, epoxidized soybean oil, dibutyl phthalate, dioctyl phthalate and sebacic acid
One of dimethyl ester is a variety of.
On the basis of the mass parts of the polyolefin polyhydric alcohol, moulding concrete provided by the invention is used can steam-cured polyurethane
The preparation material of template includes 0~20 part of diluent, preferably 0.5~19 part, more preferably 0.5~15 part.In the present invention, institute
Stating diluent is preferably urethane grade organic solvent.In the present invention, the urethane grade organic solvent is preferably acetone, acetic acid fourth
One of ester, ethyl acetate, toluene, dimethylbenzene, dimethyl carbonate and dimethyl adipate are a variety of.In the present invention, when
The moulding concrete with can steam-cured polyurethane template be thin plate (with a thickness of 0~2mm) when, preparation material in do not add diluent.
On the basis of the mass parts of the polyolefin polyhydric alcohol, moulding concrete provided by the invention is used can steam-cured polyurethane
The preparation material of template includes 3~25 parts of chain extender, preferably 4~24 parts, more preferably 5~23 parts.In the present invention, the expansion
Chain agent is preferably one of soybean oil chain extender BH760, propylene glycol, the pure and mild vegetable oil acid glycol of castor oil two or a variety of.
On the basis of the mass parts of the polyolefin polyhydric alcohol, moulding concrete provided by the invention is used can steam-cured polyurethane
The preparation material of template includes 0~3 part of antiager, preferably 0.01~2.5 part, more preferably 0.02~2 part.In the present invention
In, the antiager is preferably one of antioxidant 1010, antioxidant 245, antioxidant 1035 and antioxidant 1076 or more
Kind.
On the basis of the mass parts of the polyolefin polyhydric alcohol, moulding concrete provided by the invention is used can steam-cured polyurethane
The preparation material of template includes 0~1.5 part of defoaming agent, preferably 0.1~1.45 part, more preferably 0.1~1.4 part.In the present invention
In, the defoaming agent is preferably BYK-088.
On the basis of the mass parts of the polyolefin polyhydric alcohol, moulding concrete provided by the invention is used can steam-cured polyurethane
The preparation material of template includes 0~3 part of catalyst, preferably 0.01~2.95 part, more preferably 0.01~2.5 part.In the present invention
In, the catalyst is preferably triethylenediamine, dibutyl tin dilaurate, stannous octoate, phenylmercuric acetate or zinc naphthenate.
In the present invention, when the solidification temperature in template preparation process is greater than 80 DEG C, catalyst is not added.
The present invention also provides a kind of moulding concrete with can steam-cured polyurethane template, the system as described in above-mentioned technical proposal
Stock molding obtains.In the present invention, the moulding concrete with can the thickness of steam-cured polyurethane template be preferably 1~150mm.
The present invention provides described in above-mentioned technical proposal moulding concrete with can steam-cured polyurethane template preparation method,
Include the following steps:
(1) mixture of part polyolefin polyhydric alcohol and plasticizer is successively carried out to vacuum dehydration and cooling processing, is obtained
First polyalcohol mixture；
(2) the first polyalcohol mixture for obtaining the step (1) is mixed with isocyanates, is reacted, is obtained pre-
Aggressiveness；
(3) mixture of remaining polyolefin polyhydric alcohol and chain extender is successively carried out to vacuum dehydration and cooling processing, is obtained
To the second polyalcohol mixture；
The second polyalcohol mixture, antiager, diluent, defoaming agent and catalyst are mixed under protective atmosphere
It closes, obtains curing agent；
(4) it after mixing the performed polymer that the step (2) obtains and the curing agent that the step (3) obtains, successively carries out
Deaeration, die casting and solidification obtain polyurethane template；
The step (2) and step (3) do not have chronological order.
In the present invention, the dosage of each component and aforementioned moulding concrete use can steam-cured polyurethane moulds in the preparation method
The dosage of component is consistent in the technical solution of the preparation material of plate, and details are not described herein.
Part polyolefin polyhydric alcohol and plasticizer successively vacuum dehydration and cooling processing are obtained the first polyalcohol by the present invention
Mixture.In the present invention, the part polyolefin polyhydric alcohol accounts for 20~80wt.% of polyolefin polyhydric alcohol total amount.In this hair
In bright, ladder-elevating temperature is preferably included before the vacuum dehydration.In the present invention, the ladder-elevating temperature preferably includes successively to carry out
The first heating and the second heating.In the present invention, the initial temperature of the first heating is preferably 18~25 DEG C, and final temperature is excellent
70~95 DEG C are selected as, heating rate is preferably 1~50 DEG C/min.In the present invention, the initial temperature of second heating is preferred
It is 70~95 DEG C, final temperature is preferably 100~115 DEG C, and heating rate is preferably 0.01~10 DEG C/min.
In the present invention, the vacuum degree of the vacuum dehydration is preferably -0.085~-0.1MPa.In the present invention, described
Vacuum dehydration preferably carries out under stirring conditions.In the present invention, the rate of the stirring is preferably 1~200rpm, time
Preferably 0.2~20h.In the present invention, moisture content more in raw material is removed by vacuum dehydration, is prevented because raw material moisture is excessive
Caused raw material solidification is in the reaction vessel.
In the present invention, the final temperature of the cooling processing is preferably 5~35 DEG C, and more preferably 10~30 DEG C.This hair
The bright rate of temperature fall to the cooling processing is not particularly limited, using rate of temperature fall well known to those skilled in the art.
After obtaining the first polyalcohol mixture, the present invention mixes the first polyalcohol mixture with isocyanates, into
Row reaction, obtains performed polymer.The present invention is not particularly limited the mixing, using mixing side well known to those skilled in the art
Formula.In the present invention, addition reaction can occur for the mixing of the first polyalcohol mixture and isocyanates；In the present invention,
The temperature of the reaction is preferably 70~80 DEG C, and the reaction time is preferably 0.2~for 24 hours.In the present invention, the reaction time is logical
The nco value of measurement the first polyalcohol mixture and isocyanates mixed system is crossed to determine.In the present invention, the end of the reaction
Only nco value is preferably 10~18%.In the present invention, the nco value preferably passes through di-n-butylamine-hydrochloric titration and determines.
In the present invention, the reaction temperature preferably mode through ladder-elevating temperature reaches；The ladder-elevating temperature includes successively
The first heating of progress and the second heating.In the present invention, the initial temperature of the first heating is preferably 18~25 DEG C, is terminated
Temperature is preferably 60~65 DEG C, and heating rate is preferably 1~50 DEG C/min.In the present invention, the starting temperature of second heating
Preferably 60~65 DEG C of degree, final temperature is preferably 70~80 DEG C, and heating rate is preferably 0.01~10 DEG C/min.The present invention exists
During ladder-elevating temperature, certain addition reaction can also occur, the addition reaction time which occurs is disregarded in previous reaction
In time range.In the present invention, addition reaction can occur for the mixing of the first polyalcohol mixture and isocyanates, should add
It is the endothermic reaction under the conditions of reaction temperature less than 70 DEG C at reaction, needs to provide reaction energy with higher heating rate；
The reaction system is exothermic reaction after being greater than 70 DEG C, releases while heat improves reaction rate and improves reaction environment temperature,
To control heating rate, need to control reaction temperature with lower heating rate.
The mixture of remaining polyolefin polyhydric alcohol and chain extender is successively carried out vacuum dehydration and cooling processing by the present invention, is obtained
To the second polyalcohol mixture.In the present invention, ladder-elevating temperature is preferably included before the vacuum dehydration.In the present invention, described
Ladder-elevating temperature preferably includes the first heating successively carried out and the second heating.In the present invention, the starting temperature of the first heating
Preferably 18~25 DEG C of degree, final temperature is preferably 70~95 DEG C, and heating rate is preferably 1~50 DEG C/min.In the present invention,
The initial temperature of second heating is preferably 70~95 DEG C, and final temperature is preferably 100~115 DEG C, and heating rate is preferably
0.01~10 DEG C/min.
In the present invention, the vacuum degree of the vacuum dehydration is preferably -0.085~-0.1MPa.In the present invention, described
Vacuum dehydration preferably carries out under stirring conditions.In the present invention, the rate of the stirring is preferably 1~200rpm, time
Preferably 0.2~20h.
In the present invention, the final temperature of the cooling processing is preferably 5~35 DEG C, and more preferably 10~30 DEG C.This hair
The bright rate of temperature fall to the cooling processing is not particularly limited, using rate of temperature fall well known to those skilled in the art.
After obtaining the second polyalcohol mixture, the present invention is by the second obtained polyalcohol mixture, antiager, dilute
It releases agent, defoaming agent and catalyst to mix under protective atmosphere, obtains curing agent.
In the present invention, the protective atmosphere is preferably nitrogen atmosphere.In the present invention, protective atmosphere can protect raw material
In the high temperature environment from by the dioxygen oxidation in air.The present invention is not particularly limited the mixed mode, using this
The mode mixed known to the technical staff of field.
After obtaining performed polymer and curing agent, after the present invention mixes the performed polymer and the curing agent, successively carry out true
Empty deaeration, die casting and solidification obtain polyurethane template.
The present invention does not have particular/special requirement to the hybrid mode of performed polymer and curing agent, to be able to achieve being sufficiently mixed i.e. for the two
It can.In the present invention, the vacuum degree of the vacuum defoamation is preferably -0.085~0.1MPa；The time of the vacuum defoamation is preferred
For 0.1~for 24 hours, more preferably 0.2~20h.The present invention removes performed polymer and curing agent in mixed process by vacuum defoamation
The bubble of generation prevents bubble solidification from remaining in polyurethane template, effectively promotes the intensity of polyurethane template.
In the present invention, described to solidify the first solidification and the second solidification for preferably including successively to carry out.In the present invention, institute
Stating the first cured solidifying pressure is preferably 0~15MPa, and temperature is preferably 10~80 DEG C, and the time is preferably 0.1~for 24 hours.At this
In invention, the first cured equipment is preferably vulcanizing press.In the present invention, the described first cured mold preferably into
Row preheating.In the present invention, the temperature of the preheating is preferably 50~80 DEG C.The present invention is obtained to have and be made by the first solidification
The basic shape of type forms for concrete.
In the present invention, the described second cured temperature is preferably 80~150 DEG C, and the time is preferably 0.1~240h.This hair
It is bright that described second cured pressure is not particularly limited, using solidifying pressure well known to those skilled in the art.At this
In invention, the second cured equipment is preferably baking oven.The present invention further strengthens polyurethane template by the second solidification
Intensity promotes the lear energy of polyurethane template.
In order to further illustrate the present invention, below with reference to embodiment to moulding concrete provided by the invention with steam-cured can gathering
Urethane template preparation material and can steam-cured polyurethane template and preparation method thereof be described in detail, but they cannot be interpreted as
Limiting the scope of the present invention.Obviously, described embodiments are only a part of the embodiments of the present invention, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
According to the mass fraction, preparation material component are as follows:
52 parts of polyolefin polyhydric alcohol, BH1801 (hydroxyl value 48mgKOH/g), Tianjin Ke Feng new and high technology Co., Ltd；
15.7 parts of polyolefin polyhydric alcohol, BH1803 (101mgKOH/g), Tianjin Ke Feng new and high technology Co., Ltd；
10.4 parts of plasticizer, dioctyl phthalate, industrial level-one, Beijing industrial chemicals Co., Ltd.Part；
37.6 parts of isocyanates, 100LL, Wanhua Chemical Group Co., Ltd.；
0.9 part of diluent, dimethyl adipate, industrial level-one, Beijing industrial chemicals Co., Ltd；
15.7 parts of chain extender, BH760 (hydroxyl value 760), Tianjin Ke Feng new and high technology Co., Ltd；
0.03 part of antiager, K1010, Beijing industrial chemicals Co., Ltd；
0.14 part of defoaming agent, BYK-088, German Bi Ke (BYK) chemical company；
0.03 part of catalyst, dibutyl tin dilaurate, industrial level-one, Beijing Raw Materials Company of Chemical Industry.
52kg hydroxyl value is pungent for the polyolefin polyhydric alcohol BH1801 and 10.4kg plasticizer phthalic acid two of 48mgKOH/g
Ester is placed in reaction kettle, is warming up to 95 DEG C by 20 DEG C with the heating rate of 20 DEG C/min, then continue with the heating rate of 3 DEG C/min
105 DEG C are warming up to, being then evacuated to vacuum degree is -0.098MPa, and is stirred under the vacuum degree with the stirring rate of 85rpm
2.5h is down to 20 DEG C after stirring, be added in there-necked flask with 37.6kg liquefied mdi, be warming up to 64 with the rate of 20 DEG C/min
DEG C, it is further continued for being warming up to 74 DEG C with the heating rate of 3 DEG C/min；2h is reacted, nco value 11.5% meets nco value requirement, stops
Only reaction obtains performed polymer.
15.7kg polyolefin polyhydric alcohol BH1803 and 15.7kg chain extender BH760 are placed in reaction kettle, with 20 DEG C/min
Heating rate be warming up to 95 DEG C by 20 DEG C, then be continuously heating to 105 DEG C with the heating rate of 3 DEG C/min, be then evacuated to
Vacuum degree is -0.098MPa, and with the stirring rate stirring 2.5h of 85rpm, (test moisture content is less than under the vacuum degree
0.05%), stop vacuumizing, and be cooled to 20 DEG C, by 0.03kg catalyst, 0.03kg antiager BHT-1010,0.14kg
Defoaming agent BYK-088 and 0.9kg diluent stirs evenly in a nitrogen atmosphere, obtains curing agent.
Performed polymer and curing agent are added in reaction kettle, after mixing evenly, the vacuum defoamation 2h under the conditions of -0.098MPa,
Mixed liquor is poured into the kind mould that preheating temperature is 80 DEG C after vacuum defoamation, with 8MPa pressure, 80 DEG C on vulcanizing press
Under the conditions of solidify 2h, then will sample that die sinking is taken out be placed on 100 DEG C under the conditions of baking oven in solidify for 24 hours, it is mixed to obtain moulding
Solidifying soil is used can steam-cured polyurethane template.
Embodiment 2
According to the mass fraction, preparation material component are as follows:
39.2 parts of polyolefin polyhydric alcohol, BH1801 (hydroxyl value 48mgKOH/g), Tianjin Ke Feng new and high technology Limited Liability is public
Department；
20.1 parts of polyolefin polyhydric alcohol, BH1803 (101mgKOH/g), Tianjin Ke Feng new and high technology Co., Ltd；
7.8 parts of plasticizer, sebacic acid dimethyl ester, industrial level-one, Beijing industrial chemicals Co., Ltd；
53 parts of isocyanates, 103C, Bayer A.G；
3 parts of diluent, dimethyl carbonate, industrial level-one, Beijing industrial chemicals Co., Ltd；
26.2 parts of chain extender, BH760 (hydroxyl value 760), Tianjin Ke Feng new and high technology Co., Ltd；
0.4 part of antiager, K1010, Beijing industrial chemicals Co., Ltd；
0.1 part of defoaming agent, BYK-088, German Bi Ke (BYK) chemical company；
0.2 part of catalyst, organic vanadium catalyst, industrial level-one, Tianjin Ke Feng new and high technology Co., Ltd.
The polyolefin polyhydric alcohol BH1801 and 7.8kg plasticizer sebacic acid dimethyl ester for being 48mgKOH/g by 39.2kg hydroxyl value
It is placed in reaction kettle, is warming up to 65 DEG C by 20 DEG C with the heating rate of 5 DEG C/min, then continue with the heating rate of 0.5 DEG C/min
110 DEG C are warming up to, being then evacuated to vacuum degree is -0.098MPa, and is stirred under the vacuum degree with the stirring rate of 85rpm
1.5h is down to 20 DEG C after stirring, be added in there-necked flask with 53kg liquefied mdi, be warming up to 50 DEG C with the rate of 8 DEG C/min,
It is further continued for being warming up to 85 DEG C with the heating rate of 0.8 DEG C/min；4h is reacted, nco value 17% meets nco value requirement, stops anti-
It should obtain performed polymer.
20.1kg polyolefin polyhydric alcohol BH1803 and 26.2kg chain extender BH760 are placed in reaction kettle, with 3 DEG C/min's
Heating rate is warming up to 75 DEG C by 20 DEG C, then is continuously heating to 113 DEG C with the heating rate of 1 DEG C/min, is then evacuated to true
Reciprocal of duty cycle is -0.095MPa, and with the stirring rate stirring 3h of 85rpm, (test moisture content is less than under the vacuum degree
0.05%), stop vacuumizing, and be cooled to room temperature, 0.2kg catalyst, 0.4kg antiager BHT-1010,0.1kg are defoamed
Agent BYK-088 and 3kg diluent stirs evenly in a nitrogen atmosphere, obtains curing agent.
Performed polymer and curing agent are added in reaction kettle, after mixing evenly, the vacuum defoamation under the conditions of -0.099MPa
Mixed liquor is poured into the kind mould that preheating temperature is 70 DEG C after vacuum defoamation, is pressed on vulcanizing press with 15MPa by 0.2h
Power solidifies 3h under the conditions of 100 DEG C, then will sample that die sinking is taken out be placed on 80 DEG C under the conditions of baking oven in solidify 240h, obtain
Using to moulding concrete can steam-cured polyurethane template.
Embodiment 3
According to the mass fraction, preparation material component are as follows:
28.6 parts of polyolefin polyhydric alcohol, BH1801 (hydroxyl value 48mgKOH/g), Tianjin Ke Feng new and high technology Limited Liability is public
Department；
Polyolefin polyhydric alcohol, 18.8 parts, BH1803 (101mgKOH/g), Tianjin Ke Feng new and high technology Co., Ltd；
14.3 parts of plasticizer, epoxidized soybean oil, industrial level-one, Beijing industrial chemicals Co., Ltd；
57.1 parts of isocyanates, 103C, Bayer A.G；
5.5 parts of diluent, dimethyl carbonate, industrial level-one, Beijing industrial chemicals Co., Ltd；
28.2 parts of chain extender, BH760 (hydroxyl value 760), Tianjin Ke Feng new and high technology Co., Ltd；
0.1 part of antiager, K1010, Beijing industrial chemicals Co., Ltd；
0.1 part of defoaming agent, BYK-088, German Bi Ke (BYK) chemical company；
0.3 part of catalyst, organic vanadium catalyst, industrial level-one, Tianjin Ke Feng new and high technology Co., Ltd.
The polyolefin polyhydric alcohol BH1801 and 14.3kg plasticizer sebacic acid dimethyl ester for being 48mgKOH/g by 28.6kg hydroxyl value
It is placed in reaction kettle, is warming up to 90 DEG C by 20 DEG C with the heating rate of 15 DEG C/min, then continue with the heating rate of 0.1 DEG C/min
105 DEG C are warming up to, being then evacuated to vacuum degree is -0.1MPa, and is stirred under the vacuum degree with the stirring rate of 85rpm
3.5h is down to room temperature after stirring, is added in there-necked flask with 57.1kg liquefied mdi, is warming up to 50 with the rate of 8 DEG C/min
DEG C, it is further continued for being warming up to 85 DEG C with the heating rate of 0.8 DEG C/min；4h is reacted, nco value 19.5% meets nco value requirement,
Stop reaction and obtains performed polymer.
18.8kg polyolefin polyhydric alcohol BH1803 and 28.2kg chain extender BH760 are placed in reaction kettle, with 5 DEG C/min's
Heating rate is warming up to 80 DEG C by 20 DEG C, then is continuously heating to 105 DEG C with the heating rate of 1 DEG C/min, is then evacuated to true
Reciprocal of duty cycle is -0.1MPa, and stirs 3h (test moisture content is less than 0.05%) under the vacuum degree with the stirring rate of 85rpm,
Stopping vacuumizes, and is cooled to room temperature, by 0.3kg catalyst, 0.1kg antiager BHT-1010,0.1kg defoaming agent BYK-
088 and 5.5kg diluent stirs evenly in a nitrogen atmosphere, obtains curing agent.
Performed polymer and curing agent are added in reaction kettle, after mixing evenly, the vacuum defoamation 0.1h under the conditions of -0.1MPa,
Mixed liquor is poured into the kind mould that preheating temperature is 50 DEG C after vacuum defoamation, with 5MPa pressure, 90 DEG C on vulcanizing press
Under the conditions of solidify 1h, then will sample that die sinking is taken out be placed on 50 DEG C under the conditions of baking oven in solidify 240h, it is mixed to obtain moulding
Solidifying soil is used can steam-cured polyurethane template.
Embodiment 4
According to the mass fraction, preparation material component are as follows:
52 parts of polyolefin polyhydric alcohol, BH1801 (hydroxyl value 48mgKOH/g), Tianjin Ke Feng new and high technology Co., Ltd；
15.7 parts of polyolefin polyhydric alcohol, BH1803 (101mgKOH/g), Tianjin Ke Feng new and high technology Co., Ltd；
10.4 parts of plasticizer, dioctyl phthalate, industrial level-one, Beijing industrial chemicals Co., Ltd.Part；
37.6 parts of isocyanates, 100LL, Wanhua Chemical Group Co., Ltd.；
15.7 parts of chain extender, BH760 (hydroxyl value 760), Tianjin Ke Feng new and high technology Co., Ltd；
0.03 part of antiager, K1010, Beijing industrial chemicals Co., Ltd；
0.14 part of defoaming agent, BYK-088, German Bi Ke (BYK) chemical company；
0.03 part of catalyst, dibutyl tin dilaurate, industrial level-one, Beijing Raw Materials Company of Chemical Industry.
52kg hydroxyl value is pungent for the polyolefin polyhydric alcohol BH1801 and 10.4kg plasticizer phthalic acid two of 48mgKOH/g
Ester is placed in reaction kettle, is warming up to 95 DEG C by 20 DEG C with the heating rate of 20 DEG C/min, then continue with the heating rate of 3 DEG C/min
105 DEG C are warming up to, being then evacuated to vacuum degree is -0.098MPa, and is stirred under the vacuum degree with the stirring rate of 85rpm
2.5h is down to 20 DEG C after stirring, be added in there-necked flask with 37.6kg liquefied mdi, be warming up to 64 with the rate of 20 DEG C/min
DEG C, it is further continued for being warming up to 74 DEG C with the heating rate of 3 DEG C/min；2h is reacted, nco value 11.5% meets nco value requirement, stops
Only reaction obtains performed polymer.
15.7kg polyolefin polyhydric alcohol BH1803 and 15.7kg chain extender BH760 are placed in reaction kettle, with 20 DEG C/min
Heating rate be warming up to 95 DEG C by 20 DEG C, then be continuously heating to 105 DEG C with the heating rate of 3 DEG C/min, be then evacuated to
Vacuum degree is -0.098MPa, and with the stirring rate stirring 2.5h of 85rpm, (test moisture content is less than under the vacuum degree
0.05%), stop vacuumizing, and be cooled to 20 DEG C, by 0.03kg catalyst, 0.03kg antiager BHT-1010 and 0.14kg
Defoaming agent BYK-088 is stirred evenly in a nitrogen atmosphere, obtains curing agent.
Performed polymer and curing agent are added in reaction kettle, after mixing evenly, the vacuum defoamation 2h under the conditions of -0.098MPa,
Mixed liquor is poured into the kind mould that preheating temperature is 80 DEG C after vacuum defoamation, with 8MPa pressure, 80 DEG C on vulcanizing press
Under the conditions of solidify 2h, then will sample that die sinking is taken out be placed on 100 DEG C under the conditions of baking oven in solidify for 24 hours, it is mixed to obtain moulding
Solidifying soil is used can steam-cured polyurethane template.
Embodiment 5
According to the mass fraction, preparation material component are as follows:
52 parts of polyolefin polyhydric alcohol, BH1801 (hydroxyl value 48mgKOH/g), Tianjin Ke Feng new and high technology Co., Ltd；
15.7 parts of polyolefin polyhydric alcohol, BH1803 (101mgKOH/g), Tianjin Ke Feng new and high technology Co., Ltd；
10.4 parts of plasticizer, dioctyl phthalate, industrial level-one, Beijing industrial chemicals Co., Ltd.Part；
37.6 parts of isocyanates, 100LL, Wanhua Chemical Group Co., Ltd.；
0.9 part of diluent, dimethyl adipate, industrial level-one, Beijing industrial chemicals Co., Ltd；
15.7 parts of chain extender, BH760 (hydroxyl value 760), Tianjin Ke Feng new and high technology Co., Ltd；
0.14 part of defoaming agent, BYK-088, German Bi Ke (BYK) chemical company；
0.03 part of catalyst, dibutyl tin dilaurate, industrial level-one, Beijing Raw Materials Company of Chemical Industry.
52kg hydroxyl value is pungent for the polyolefin polyhydric alcohol BH1801 and 10.4kg plasticizer phthalic acid two of 48mgKOH/g
Ester is placed in reaction kettle, is warming up to 95 DEG C by 20 DEG C with the heating rate of 20 DEG C/min, then continue with the heating rate of 3 DEG C/min
105 DEG C are warming up to, being then evacuated to vacuum degree is -0.098MPa, and is stirred under the vacuum degree with the stirring rate of 85rpm
2.5h is down to 20 DEG C after stirring, be added in there-necked flask with 37.6kg liquefied mdi, be warming up to 64 with the rate of 20 DEG C/min
DEG C, it is further continued for being warming up to 74 DEG C with the heating rate of 3 DEG C/min；2h is reacted, nco value 11.5% meets nco value requirement, stops
Only reaction obtains performed polymer.
15.7kg polyolefin polyhydric alcohol BH1803 and 15.7kg chain extender BH760 are placed in reaction kettle, with 20 DEG C/min
Heating rate be warming up to 95 DEG C by 20 DEG C, then be continuously heating to 105 DEG C with the heating rate of 3 DEG C/min, be then evacuated to
Vacuum degree is -0.098MPa, and with the stirring rate stirring 2.5h of 85rpm, (test moisture content is less than under the vacuum degree
0.05%), stop vacuumizing, and be cooled to 20 DEG C, 0.03kg catalyst, 0.14kg defoaming agent BYK-088 and 0.9kg are diluted
Agent stirs evenly in a nitrogen atmosphere, obtains curing agent.
Performed polymer and curing agent are added in reaction kettle, after mixing evenly, the vacuum defoamation 2h under the conditions of -0.098MPa,
Mixed liquor is poured into the kind mould that preheating temperature is 80 DEG C after vacuum defoamation, with 8MPa pressure, 80 DEG C on vulcanizing press
Under the conditions of solidify 2h, then will sample that die sinking is taken out be placed on 100 DEG C under the conditions of baking oven in solidify for 24 hours, it is mixed to obtain moulding
Solidifying soil is used can steam-cured polyurethane template.
Embodiment 6
According to the mass fraction, preparation material component are as follows:
39.2 parts of polyolefin polyhydric alcohol, BH1801 (hydroxyl value 48mgKOH/g), Tianjin Ke Feng new and high technology Limited Liability is public
Department；
20.1 parts of polyolefin polyhydric alcohol, BH1803 (101mgKOH/g), Tianjin Ke Feng new and high technology Co., Ltd；
7.8 parts of plasticizer, sebacic acid dimethyl ester, industrial level-one, Beijing industrial chemicals Co., Ltd；
53 parts of isocyanates, 103C, Bayer A.G；
3 parts of diluent, dimethyl carbonate, industrial level-one, Beijing industrial chemicals Co., Ltd；
26.2 parts of chain extender, BH760 (hydroxyl value 760), Tianjin Ke Feng new and high technology Co., Ltd；
0.4 part of antiager, K1010, Beijing industrial chemicals Co., Ltd；
2 parts of catalyst, organic vanadium catalyst, industrial level-one, Tianjin Ke Feng new and high technology Co., Ltd.
The polyolefin polyhydric alcohol BH1801 and 7.8kg plasticizer sebacic acid dimethyl ester for being 48mgKOH/g by 39.2kg hydroxyl value
It is placed in reaction kettle, is warming up to 65 DEG C by 20 DEG C with the heating rate of 5 DEG C/min, then continue with the heating rate of 0.5 DEG C/min
110 DEG C are warming up to, being then evacuated to vacuum degree is -0.098MPa, and is stirred under the vacuum degree with the stirring rate of 85rpm
1.5h is down to 20 DEG C after stirring, be added in there-necked flask with 53kg liquefied mdi, be warming up to 50 DEG C with the rate of 8 DEG C/min,
It is further continued for being warming up to 85 DEG C with the heating rate of 0.8 DEG C/min；4h is reacted, nco value 17% meets nco value requirement, stops anti-
It should obtain performed polymer.
20.1kg polyolefin polyhydric alcohol BH1803 and 26.2kg chain extender BH760 are placed in reaction kettle, with 3 DEG C/min's
Heating rate is warming up to 75 DEG C by 20 DEG C, then is continuously heating to 113 DEG C with the heating rate of 1 DEG C/min, is then evacuated to true
Reciprocal of duty cycle is -0.095MPa, and with the stirring rate stirring 3h of 85rpm, (test moisture content is less than under the vacuum degree
0.05%), stop vacuumizing, and be cooled to room temperature, 0.2kg catalyst, 0.4kg antiager BHT-1010 and 3kg are diluted
Agent stirs evenly in a nitrogen atmosphere, obtains curing agent.
Performed polymer and curing agent are added in reaction kettle, after mixing evenly, the vacuum defoamation under the conditions of -0.099MPa
Mixed liquor is poured into the kind mould that preheating temperature is 70 DEG C after vacuum defoamation, is pressed on vulcanizing press with 15MPa by 0.2h
Power solidifies 3h under the conditions of 100 DEG C, then will sample that die sinking is taken out be placed on 80 DEG C under the conditions of baking oven in solidify 240h, obtain
Using to moulding concrete can steam-cured polyurethane template.
Embodiment 7
According to the mass fraction, preparation material component are as follows:
52 parts of polyolefin polyhydric alcohol, BH1801 (hydroxyl value 48mgKOH/g), Tianjin Ke Feng new and high technology Co., Ltd；
15.7 parts of polyolefin polyhydric alcohol, BH1803 (101mgKOH/g), Tianjin Ke Feng new and high technology Co., Ltd；
10.4 parts of plasticizer, dioctyl phthalate, industrial level-one, Beijing industrial chemicals Co., Ltd.Part；
37.6 parts of isocyanates, 100LL, Wanhua Chemical Group Co., Ltd.；
0.9 part of diluent, dimethyl adipate, industrial level-one, Beijing industrial chemicals Co., Ltd；
15.7 parts of chain extender, BH760 (hydroxyl value 760), Tianjin Ke Feng new and high technology Co., Ltd；
0.03 part of antiager, K1010, Beijing industrial chemicals Co., Ltd；
0.14 part of defoaming agent, BYK-088, German Bi Ke (BYK) chemical company.
52kg hydroxyl value is pungent for the polyolefin polyhydric alcohol BH1801 and 10.4kg plasticizer phthalic acid two of 48mgKOH/g
Ester is placed in reaction kettle, is warming up to 95 DEG C by 20 DEG C with the heating rate of 20 DEG C/min, then continue with the heating rate of 3 DEG C/min
105 DEG C are warming up to, being then evacuated to vacuum degree is -0.098MPa, and is stirred under the vacuum degree with the stirring rate of 85rpm
2.5h is down to 20 DEG C after stirring, be added in there-necked flask with 37.6kg liquefied mdi, be warming up to 64 with the rate of 20 DEG C/min
DEG C, it is further continued for being warming up to 74 DEG C with the heating rate of 3 DEG C/min；2h is reacted, nco value 11.5% meets nco value requirement, stops
Only reaction obtains performed polymer.
15.7kg polyolefin polyhydric alcohol BH1803 and 15.7kg chain extender BH760 are placed in reaction kettle, with 20 DEG C/min
Heating rate be warming up to 95 DEG C by 20 DEG C, then be continuously heating to 105 DEG C with the heating rate of 3 DEG C/min, be then evacuated to
Vacuum degree is -0.098MPa, and with the stirring rate stirring 2.5h of 85rpm, (test moisture content is less than under the vacuum degree
0.05%), stop vacuumizing, and be cooled to 20 DEG C, by 0.03kg antiager BHT-1010,0.14kg defoaming agent BYK-088
It is stirred evenly in a nitrogen atmosphere with 0.9kg diluent, obtains curing agent.
Performed polymer and curing agent are added in reaction kettle, after mixing evenly, the vacuum defoamation 2h under the conditions of -0.098MPa,
Mixed liquor is poured into the kind mould that preheating temperature is 80 DEG C after vacuum defoamation, with 8MPa pressure, 80 DEG C on vulcanizing press
Under the conditions of solidify 2h, then will sample that die sinking is taken out be placed on 100 DEG C under the conditions of baking oven in solidify for 24 hours, it is mixed to obtain moulding
Solidifying soil is used can steam-cured polyurethane template.
The moulding concrete that Examples 1 to 7 is obtained according to GB/T528-2009 with can steam-cured polyurethane template draw
It stretches intensity and elongation at break test, test result is shown in Table 1；The moulding that Examples 1 to 3 is obtained according to GB/T531.1-2008
Concrete with can steam-cured polyurethane template carry out hardness test, test result is shown in Table 1.
1 Examples 1 to 7 polyurethane template test result of table
Seen from table 1, the embodiment of the present invention 1~7 obtains moulding concrete with can steam-cured polyurethane template stretching it is strong
Degree is 5.5~8.5MPa, and tensile strength is big；Elongation at break is 210~380%, and elongation at break is high, illustrates the poly- ammonia of the present invention
Ester template has stronger tear-resistant ability.Meanwhile after 70 DEG C, 20%NaOH solution impregnate 1000h, polyurethane template is stretched
Loss late is 4.3~6.2%, and stretching loss late is low, illustrates that polyurethane template of the present invention has resistance to alkaline hydrolysis, ageing-resistant performance；
Hardness meets moulding concrete polyurethane mould material hardness requirement up to 50~80ShoreA.
Polyurethane template of the present invention has excellent resistance to alkaline hydrolysis performance and ageing-resistant performance, and it is raw to be suitable for steam curing process
Prepared by the moulding concrete component of production, can use in 60 DEG C of vapor (steam) temperatures, while mould material has resistance to tearing performance, can be with
It realizes repeated multiple times use, there is high industrial application value.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of moulding concrete with can steam-cured polyurethane template preparation material, which is characterized in that including following content of component:
2. preparation according to claim 1 material, which is characterized in that the hydroxyl value of the polyolefin polyhydric alcohol is 45~
110mgKOH/g, degree of functionality are 2.0~2.5；
The isocyanates is different for liquefaction methyl diphenylene diisocyanate, polymeric diphenylmethane diisocyanate, toluene two
One of cyanate, hexamethylene diisocyanate, hydrogenated diphenyl methane diisocyanate and naphthalene diisocyanate are a variety of；
The plasticizer is phenyl alkylsulf, epoxidized soybean oil, dibutyl phthalate, dioctyl phthalate and certain herbaceous plants with big flowers
One of acid dimethyl is a variety of；
The diluent is urethane grade organic solvent；
The chain extender is one of soybean oil chain extender BH760, propylene glycol, the pure and mild vegetable oil acid glycol of castor oil two or more
Kind；
The antiager is one of antioxidant 1010, antioxidant 245, antioxidant 1035 and antioxidant 1076 or a variety of；
The defoaming agent is BYK-088；
The catalyst is triethylenediamine, dibutyl tin dilaurate, stannous octoate, phenylmercuric acetate or zinc naphthenate.
3. preparation according to claim 2 material, which is characterized in that the urethane grade organic solvent be acetone, butyl acetate,
One of ethyl acetate, toluene, dimethylbenzene, dimethyl carbonate and dimethyl adipate are a variety of.
4. a kind of moulding concrete is with can steam-cured polyurethane template, which is characterized in that described in any item by claims 1 to 3
Preparation material molding obtains.
5. moulding concrete as claimed in claim 4 with can steam-cured polyurethane template preparation method, which is characterized in that including such as
Lower step:
(1) mixture of part polyolefin polyhydric alcohol and plasticizer is successively carried out to vacuum dehydration and cooling processing, obtains first
Polyalcohol mixture；
(2) the first polyalcohol mixture for obtaining the step (1) is mixed with isocyanates, is reacted, obtains performed polymer；
(3) mixture of remaining polyolefin polyhydric alcohol and chain extender is successively carried out to vacuum dehydration and cooling processing, obtains the
Two polyalcohol mixtures；
The second polyalcohol mixture, antiager, diluent, defoaming agent and catalyst are mixed under protective atmosphere, obtained
To curing agent；
(4) will after performed polymer that the step (2) obtains and curing agent that the step (3) obtains mix, successively carry out deaeration,
Die casting and solidification obtain polyurethane template；
The step (2) and step (3) do not have chronological order.
6. preparation method according to claim 5, which is characterized in that in the step (1) and step (3) before vacuum dehydration
Carry out ladder-elevating temperature；The ladder-elevating temperature includes the first heating successively carried out and the second heating；The starting of the first heating
Temperature is 18~25 DEG C, and final temperature is 70~95 DEG C, and heating rate is 1~50 DEG C/min；The starting temperature of second heating
Degree is 70~95 DEG C, and final temperature is 100~115 DEG C, and heating rate is 0.01~10 DEG C/min.
7. preparation method according to claim 5, which is characterized in that vacuum dehydration in the step (1) and step (3)
Vacuum degree independently is -0.085~-0.1MPa；The stirring rate when vacuum dehydration independently is 1~200rpm, time
It independently is 0.2~20h.
8. preparation method according to claim 5, which is characterized in that the temperature reacted in the step (2) is 70~80
DEG C, time of reaction is 0.2~for 24 hours.
9. preparation method according to claim 8, which is characterized in that reaction temperature is through ladder-elevating temperature in the step (2)
Reach；The ladder-elevating temperature includes the first heating successively carried out and the second heating；The initial temperature of the first heating is 18
~25 DEG C, final temperature is 60~65 DEG C, and heating rate is 1~50 DEG C/min；It is described second heating initial temperature be 60~
65 DEG C, final temperature is 70~80 DEG C, and heating rate is 0.01~10 DEG C/min.
10. preparation method according to claim 5, which is characterized in that the vacuum degree of vacuum defoamation in the step (4)
For -0.085~-0.1MPa, the time is 0.1~for 24 hours；Described solidify includes the first solidification and the second solidification successively carried out；Institute
State the first cured pressure be 0~15MPa, temperature be 10~80 DEG C, the time be 0.1~for 24 hours；The second cured temperature is
80~150 DEG C, the time is 0.1~240h.
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| CN111002444A (en) * | 2019-11-29 | 2020-04-14 | 中建科技河南有限公司 | Production method of decoration integrated prefabricated part |
| CN111533877A (en) * | 2020-05-19 | 2020-08-14 | 于丰 | Polyurethane template for modeling concrete and preparation process thereof |
| CN114685755A (en) * | 2020-12-29 | 2022-07-01 | 浙江华峰新材料有限公司 | Steam-resistant polyurethane elastomer and preparation method thereof |
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Inventor after: Xia Chunlei Inventor after: Qiang Shunkai Inventor after: Feng Shuzhou Inventor after: Cao Dini Inventor before: Xia Chunlei |
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